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iSpring US31 3-Stage Under Sink Water Filter System with Faucet, 1 Year | 10000 Gal, NSF/ANSI Certified Filters, Reduces Chlorine, Sediment, and Harmful Chemicals, SGS-Tested, 5–10 Years Housings
- Classic 3-Stage 2.5x10-inch Olddies
- 10,000-Gallon Ultra Capacity
- Physics and Math Never Lie
- NSF/ANSI Certified Filter
$97.00
Price as of Oct 16, 2026, 7:47 AM UTC. Prices and availability are subject to change. The price shown on Amazon at the time of purchase applies.
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Key features
Classic 3-Stage 2.5x10-inch Olddies
Invented in the 1970s and a de facto industrial standard and the most popular so far. Why? Repliable, Trustworthy, Get the job done, and, fortunately or unfortunately, Dirt Cheap, only $17.43 for 3 stages pack iSpring F3.
10,000-Gallon Ultra Capacity
Built for long-term performance with a filter life of up to 12 months. Enjoy high-quality water year-round with fewer replacements and lower maintenance costs.
Physics and Math Never Lie
With reusable housing, each cartridge is nearly full of filtration material: 355g, about 1kg total in 3 stages. That's 7x more filtration material than quick-change filters (only 135g in a single stage).
NSF/ANSI Certified Filter
The PP, GAC, and CTO triple-filtration stack reduces chlorine, sand, dirt, rust, bad taste, sediment, and odors for elite-level safety.
Smart Visibility & Premium Finish
： Features a high-quality brushed nickel faucet and a transparent 1st-stage housing, allowing for easy visual filter inspections at a glance.
Fresh Mineral Taste
Deeply purifies while retaining essential natural minerals. Delivers a crisp, refreshing taste similar to high-end bottled mineral water. (Note: Does not reduce TDS; for scale removal, choose iSpring RO systems).
Patented Above-Counter Installation
： No more struggling under the sink! The top-mounted fastener allows you to secure the faucet entirely from above the countertop, making installation fast and hassle-free.
20x Faster Flow Rate
Delivers an on-demand flow of 1 GPM—20 times faster than standard water pitchers. Perfect for instant drinking, washing produce, or filling large pots without the wait.
U.S.-Based Expert Support
Includes a 1-year manufacturer warranty and lifetime technical support from our dedicated team in Atlanta, GA. Reliable quality and service you can trust.
iSpring US31 3-Stage Under Sink Water Filter System with Faucet, 1 Year | 10000 Gal, NSF/ANSI Certified Filters, Reduces Chlorine, Sediment, and Harmful Chemicals, SGS-Tested, 5–10 Years Housings
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